Magnetic head slider

Abstract

A magnetic head slider (1) has a first rail (20) with a first air bearing surface, a second rail (25) with a second air bearing surface and further a third rail (15) with a third air bearing surface. The third rail is formed between the first rail (20) and the second rail (25). On both sides of the third air bearing surface (16), a first air pressurization part (17) and a second air pressurization part (18) are formed sunk by respective depths. When the skew angle "θ" occurs, appropriate pressurized air flows are generated by the first air pressurization part (17) and the second air pressurization part (18) to compensate for the lifting force.

What is claimed is: 
     
       1. A magnetic head slider comprising: a surface having a front end, a rear end, and two side edges, said surface having a full length between the front end and the rear end, said surface for facing to a magnetic disk with a predetermined pitch angle,   a first rail having a first air bearing surface, the first rail being disposed on said surface along one of said side edges and extending from said front end of said surface toward said rear end of said surface,   a second rail having a second air bearing surface, the second rail being disposed on said surface along a remaining one of said two side edges and extending from said front end toward said rear end,   wherein each of the first and second rails extend over a length less than the full length; and   a third rail having a third air bearing surface, the third rail being disposed on said surface between said first rail and said second rail, said third air bearing surface being disposed between a first air pressurization part and a second air pressurization part,   wherein said first air pressurization part and said second air pressurization part are sunk by a same depth from said third air bearing surface, and a width of said first air pressurization part is larger than a width of said second pressurization part.   
     
     
       2. A magnetic head slider in accordance with claim 1, wherein said third rail is disposed on said surface and extends from an intermediate part of said surface to said rear end. 
     
     
       3. A magnetic head slider in accordance with claim 1, wherein said third rail is disposed on said surface and extends from said front end to said rear end. 
     
     
       4. A magnetic head slider in accordance with claim 1, wherein said first air pressurization part and said second air pressurization part are formed parallel with said air bearing surface. 
     
     
       5. A magnetic head slider in accordance with claim 1, wherein said depth is between 0.1 μm and 4.0 μm. 
     
     
       6. A magnetic head slider in accordance with claim 1, wherein said first air pressurization part and said second air pressurization part are formed into a tapered shape with an angle to said third air bearing surface. 
     
     
       7. A magnetic head slider in accordance with claim 6, wherein said angle is less than 2 degrees. 
     
     
       8. A magnetic head slider in accordance with claim 1, wherein said third rail includes a semi-cylindrical part at an end of said third rail proximate said front end and each said first and said second air pressurization parts includes at least one inclined edge proximate said front end. 
     
     
       9. A magnetic head slider in accordance with claim 1, wherein said first rail includes a first step part extending from an end of said first rail to said rear end of said surface; and said second rail includes a second step part extending from an end of said second rail to said rear end of said surface.   
     
     
       10. A magnetic head slider in accordance with claim 1, further comprising: a magnetic transducer having a magnetic gap, said magnetic gap being fixed at said rear end of said surface such that said magnetic gap is substantially coplanar with said third air bearing surface.